Table 2.

Case series analysis of differences before and after cochlear implantation

Test	Subtest	Unadjusted differences comparing performance post vs pre CI							Average difference
		P1	P2	P3	P4	P5	P6	P7
WASI	Vocabulary	+2	+2	0	0	0	−2	0	0.29a
	Block Design	0	–	–	–	+3	+2	0	1.25b
	Similarities	+1	–	–	–	−2	0	0	−0.25
	Matrix Reasoning	+2	–	+2	+2	0	+2	−2	1.00b
Other	TMT A	−2	−2	0	+2	−3	−2	0	−1.00
	TMT B	−2	−2	+2	0	−2	−4	−5	−1.86
	BNT	0	0	+4	0	0	0	0	0.57a
	Animals	+2	0	−2	−2	+4	−2	+1	0.14a
	FAS	+2	−5	0	0	+4	−2	+1	0.00
RBANS	Complex Figure	−2	−4	−2	−2	−6	0	−2	−2.57
	Line Orientation	+1	0	+1	+2	0	0	−2	0.29a
	Digits Forward	0	+4	−2	−2	+2	0	0	0.29a
	Coding	0	–	–	–	+6	–	+2	2.67c
	Semantic Fluency	+2	+2	0	−2	+4	+2	+2	1.43b
	List Learning	−2	0	+2	+1	+6	+6	+1	2.00c
	List Recall	+4	0	+2	+2	0	0	+4	1.71b
	List Recognition	+1	–	+6	+1	+2	+2	+1	2.17c
	Story Memory	+2	+2	+6	0	+2	+2	0	2.00c
	Story Recall	0	+2	+4	0	+2	+2	+2	1.71b
	Visual Memory	0	−2	−2	−2	0	0	−4	−1.43

Notes: Difference (average change; Δ_sample) detected at the sample level:

^a0 units < Δ_sample <1 unit;

^b1 unit ≤ Δ_sample <2 units;

^c+ Δsample ≥2 units. De-identified participants: P1–P7. “–” denotes no data.

Abbreviations: CI, cochlear implant; BNT, Boston Naming Test; RBANS, Repeatable Battery for the Assessment of Neuropsychological Functioning; TMT, Trail Making Test A; TMT B, Trail Making Test B; WASI, Wechsler Abbreviated Scale of Intelligence.